The Jeff Stephen's Sauer serialization project as chronicled in DGJ August 2004, Vol. 15 Issue 3, at page 88 gives that the serial number range 108,901 to 115,600 as having been issued a serial number in 1904. So the parts kit was set back or sitting in a corner at Sauer and sometime post 1912, possibly when times were difficult, in an attempt to fill an order older components were used.

Kind Regards,

Raimey
rse